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Finding the Fourth Proportional to 752.73, 1,037.28 and 612.39

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Solution

The fourth proportional to 752.73, 1,037.28 and 612.39 is: 843.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.73 : 1,037.28 = 612.39 : x
  2. Step 2: Convert to fraction form
    752.73/1,037.28 = 612.39/x
  3. Step 3: Cross multiply
    752.73x = 1,037.28 × 612.39
  4. Step 4: Simplify right side
    752.73x = 635,219.90
  5. Step 5: Solve for x
    x = 635,219.90/752.73
  6. Step 6: Final answer
    x = 843.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.